Lithium battery positive material and manufacturing method thereof

Abstract

A lithium battery positive material includes lithium nickel manganese oxide (LNMO) doped with copper, titanium, nitrogen, and carbon. In addition, a manufacturing method of the lithium battery positive material is also provided.

What is claimed is: 
     
         1 . A lithium battery positive material, comprising lithium nickel manganese oxide doped with copper, titanium, nitrogen, and carbon. 
     
     
         2 . The lithium battery positive material according to  claim 1 , wherein a weight ratio of lithium nickel manganese oxide: copper/titanium: nitrogen/carbon in the lithium nickel manganese oxide doped with copper, titanium, nitrogen, and carbon ranges from 1:0.4:0.1 to 1:0.1:0.1. 
     
     
         3 . The lithium battery positive material according to  claim 1 , wherein an average particle size of the lithium nickel manganese oxide doped with copper, titanium, nitrogen, and carbon is 0.5 microns to 20 microns. 
     
     
         4 . A manufacturing method for manufacturing a lithium battery positive material, the manufacturing method comprising:
 using a copper source, a titanium source, and lithium nickel manganate powder to form a precursor of lithium nickel manganese oxide doped with copper and titanium by performing a co-precipitation method, a filtration process, and a sintering process; and   mixing the precursor of the lithium nickel manganese oxide doped with copper and titanium with a carbon source, and coating a nitrogen source by a supercritical fluid extraction method to obtain the lithium nickel manganese oxide doped with copper, titanium, nitrogen, and carbon.   
     
     
         5 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein the copper source comprises copper chloride, copper sulfate, copper sulfite, copper nitrate, copper acetate, or a combination thereof. 
     
     
         6 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein the titanium source comprises titanium chloride, titanium sulfate, titanium nitrate, or a combination thereof. 
     
     
         7 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein the nitrogen source comprises dopamine, p-phenylenediamine, or a combination thereof. 
     
     
         8 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein the carbon source comprises graphene, glucose, or a combination thereof. 
     
     
         9 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein a co-precipitation agent used in the co-precipitation method comprises water, ethanol, isopropyl alcohol, acetone, methyl ethyl ketone, ammonia, sodium hydroxide, sodium carbonate, or a combination thereof; a co-precipitation reaction temperature in the co-precipitation method ranges from 25° C. to 100° C., and a co-precipitation reaction time in the co-precipitation method ranges from 1 minute to 30 minutes. 
     
     
         10 . The manufacturing method for manufacturing the lithium battery positive material according to  claim 4 , wherein a temperature of the sintering process ranges from 400° C. to 1000° C.